Figure 7
From: Nitrogen-doped hollow carbon sphere composite Mn3O4 as an advanced host for lithium-sulfur battery
(a, b) CV curves of NHCS/S and NHCS/Mn3O4/S cathodes; (c, d) EIS spectra of NHCS/S and NHCS/Mn3O4/S batteries before 0.1 C cycle and after 100 cycles.
